Roll-heating means



July 3, 1928.

cs. FOX

ROLL HEATING MEAN S Filed June 4, 1923 vection Patented July 3,. 1928.

UNITED STATES PATENT OFFICE.

eonnon FOX, or cnrcaeo,

or cmcaeo,

ROLL-HEATING means.

Application filed June 4,

The present invention relates to roll heat- .ing means.

The finishing rolls in a sheet mill are commonly operated at high temperatures in order that the thin gauge metal being rolled may not be unduly cool. In starting operations it is necessar to bring up the temperature of the ro ls, this raising in temperature being accomplished in some inm stances by passing heated sheet forming bars between the rolls.- Steam, hot air, gas flame and other means have been employed for heating said rolls. Another common method is to apply heating elements in metallio contact with the periphery of the rolls,

the heat being transferred to the rolls by conduction. The last mentioned method reqxlliires that the rolls be stationary during t e heating operation. Though a sheet mill has been referred to by way of example, it will be clear that the invention is of broader application, being applicable to the heating of rolls inmany arts.

An object of the present invention is to provide means for efliciently heating the rolls while said rolls are in rotation.

'A further object is to provide meansfor heating the rolls of rolling mills by transmitting heat thereto by radiation and confrom a heating device located in close proximity to the periphery of the rolls but not in actual cont-act therewith.

.A further. object is to provide efiicient means for electrically heating rolling mill :5 rolls.

Further objects will appear as the description proceeds.

The one figure of the drawing represents, diagrammatically, one embodiment of the 40 present invention.

The numeral 1 indicates a frame, which rovides bearings for a air of rolls 2-2.

he frame 1 maybe slida ly mounted upon the tracks 3-3 for the purpose of ermit- 4!! tin longitudinal movement of the rame 1 an the rolls 2-2. Each of the rolls has operatively associated therewith a heating device 4. The devices 4-4 may be electric heaters and each will preferably conform to the contour of its corresponding roller throughout a considerable proportion of the periphery of said roller-and throughout a considerable proportion of the length of said roller. Said heating devices 4-4 will be held in spaced relation with the rolls 2-2,

1923. Serial No. 643,198.

preferred, the electrical circuits of the two heaters may be independent of one another, whereby the heating action of each heating device may be controlled independently of the other.

It will be clear that the heating devices 4-4 may be heated in other ways than by means of an electric current, though electric current is at present preferred. By reason of the present invention, the rolls 2-2 may be eflicient-ly heated, either before the rolls are put in operation or while said rolls are rotating. Inasmuch as the heaters closely encircle considerable portions of the rolls, very little of the heat from said heating devices is lost, it being a simple matter to direct the heat rays inwardly to the rolls.

Though a preferred embodiment of the present invention has been illustrated, it will e clear that many modifications may be made without departing from the invention. It is intended in this patent to cover all such modifications that fall -within the scope of the invention as defined by the appended claims.

What'is claimed is:

1. In a sheet mill, a rotating roll, an electrical heating device conforming to the periphery of said roll throughout a substantial portion of said periphery, and means for holding said heating device in proximity to said roll but spaced therefrom, said heating device including electric heating elements and a heat confining cover for confining heat to said rolls.

2. In a sheet mill, a pair of rolls having their axes parallel, an electrical heating device operatively associated with oneof said rolls and con orming to the periphery of said one roll throughout a substantial portion of said periphery, and means for holdllll ing said heating device in proximity to said in position for lying adjacent to, but out of roll but spaced therefrom, said heating decontact with, embraced rolls, and a heat vice being disposed out of obstructing relaconfining cover supported by said members. tionship with said rolls, said heating de- 4. In combination, a pair of rolls, means 20 vice including electric heating elements and for rotatably supporting said rolls, a heater a heat confining cover for confining heat to arranged in circumferential relationship said rolls. with one of said rolls, but spaced therefrom,

3.- A heater of the character described, said heater being disposed out of obstruct-' comprising a pair of complemental heater in relationship with the pass between said 25 sections for mounting in jacketing relation rolls, and means for a'djustably carrying to a set of rolls, and means for supporting said heater whereby the spaced relationship said Sections in such relation, each section between said heater and its cooperating roll comprising frame members shaped in submay be controlled. stantial conformity to the roll surfaces to Signed at Chicago, Illinois, this 31 day of 30 be embraced thereby, a plurality of electrical May, 1923.

heating elements carried by said members GORDON FOX. 

